There's a lot of value inherent to the ability to remain anonymous on the internet. This essentially strips that away because to retain that anonymity you have to commit a felony.

Innocuous example: for a while people wanted to know who horse_ebooks was, and there was some allure to that. Under this rule some low-level government employee can essentially leak it to all of their friends, or worse — blackmail.

Now we're creating two groups of people:

A. Those who are not anonymous

B. Felons